AndreasCh

I think the Mustang is just for fun. Nevada will be released later this year (which I hoped it was sooner) and they are also working on the next series fixed wing fighter module. I don't think they are releasing P-51 as a module, but more like a small addon to make a little bit extra money, this is a business after all, they are here to make money.

I have a GTX295 and I'm really considering buying a 580. But to answer your question - Yes, memory size matters, but also clock and shader size matters etc etc.Here's the config for an EVGA GeForce GTX 580 3072MB GDDR5:Features:-- Core Clock: 772MHz (Fermi GF110)- 64 TMUs (GTX 480 had 60 TMUs)- Memory: 3072MB GDDR5- Memory Clock: 4008MHz (Effective)- Memory Interface: 384-Bit- Processing Cores: 512- Shader Clock: 1544MHz- Bus Type: PCI-Express 2.0- Display Connectors: 2x Dual-Link DVI-I & 1x Mini-HDMI 1.4a (Includes HDMI & VGA Adapters)- SLI Ready (Upto 3-Way SLI Supported)- HDCP Capable- DirectX 11 Support- OpenGL 4.0 Support- PhysX Enabled- CUDA Enabled- 3D Vision Enabled- NVIDIA Surround Enabled- Lower power consumption compared to GTX 480, only 244 watts- Warranty: 10 Years (Requires registration within 30 days with EVGA)And here's for a Gigabyte GeForce GTX 560Ti OC 1024MB GDDR5:Features:-- Core Clock: 900MHz- Memory: 1024MB GDDR5- Memory Clock: 4000MHz (Effective)- Memory Interface: 256-Bit- Processing Cores: 384- Shader Clock: 1800MHz- Bus Type: PCI-Express 2.0- Display Connectors: 2x Dual-Link DVI-I & 1x HDMI 1.4a (Includes HDMI & VGA Adapters)- SLI Ready- HDCP Capable- DirectX 11 Support- OpenGL 4.0 Support- PhysX Enabled- CUDA Enabled- 3D Vision Enabled- NVIDIA Surround Enabled- Warranty: 3 yearsBoth Gigabyte and EVGA are the best in the market right now with Gigabyte only recently started to produce graphic cards with amazing quality and EVGA being a traditional big player in graphic cards. Of course the biggest factor here is the price and there's a huge difference of about 250-300 pounds between the two above. You can always go for a between (GTX570) or ATI cards.